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Google+ will be a fine replacement for Facebook when everybody gets the signal that FB has entered it's Newscorp-era Myspace phase. But there's another possibility: Facebook may end up leaving such a bad taste in people's mouths that it will be replaced by nothing . Both G+ and FB may fade away as the world collectively says "fuck this". You might say I'm a dreamer.
It makes sense that G+ could outlive Facebook if only because it's so tightly integrated with a suite of products that are so widely used, where Facebook's primary external integration is through apps that aren't essential to the day-in-day out...at least not yet. I think Facebook has become to tightly woven into peoples' lives, though, that it's going to live on for quite some time. It all really depends on where th…
And as of late, the kids have been ditching Facebook because it's not cool anymore.